Validation of a percolation model for passivation of FeCr alloys: I current efficiency in the incompletely passivated state

R. C. Newman, Tuck Meng Foong Tuck Meng, K. Sieradzki

Research output: Contribution to journalArticle

47 Scopus citations

Abstract

FeCr alloys with ≤ 17 at.% Cr show incomplete primary passivation in acid solutions, with a residual current which decreases steeply with increasing Cr content in the range 8 - 12 at.%. According to the percolation model of Sieradzki and Newman, incomplete passivation should be associated with detachment of tiny metal particles, whose surface are passivated by finite clusters of Cr atoms; this should lead to discrepancies between mass loss and anodic charge, which have now been detected for three alloys (7.8, 10.0 and 11.6 at.% Cr).

Original languageEnglish (US)
Pages (from-to)523-527
Number of pages5
JournalCorrosion Science
Volume28
Issue number5
DOIs
StatePublished - 1988
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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